A flaw was discovered in Elasticsearch 7.17.0’s upgrade assistant, in which upgrading from version 6.x to 7.x would disable the in-built protections on the security index, allowing authenticated users with “*” index permissions access to this index.
[
{
"product": "elasticsearch",
"vendor": "Elastic",
"versions": [
{
"status": "affected",
"version": "Versions 7.16.0 through 7.17.0"
}
]
}
]